       The suggested smoothness indicators \(\beta _{k}\)  of Jiang
and Shu in [1]} are given by
\(\beta _{k}=\sum _{q=1}^{2}\triangle x^{2q-1}_{x-\frac{\triangle x}{2}}^{x+\frac{\triangle x}{2}}\left(\frac{d^{q}\hat{f}^{k}}{dx^{q}}\right)^{2}dx.\) 
